Jersey Knitted Polyester SIZE & DEPTH: This Guardmax Mattress Encasement fits a Sleeper Sofa Size Couch that measures 60 x 72 x 5. It stretches to fit a mattress with a depth up to 6 inches. JERSEY KNITTED: The Guardmax Mattress Encasement is jersey knitted in order to combine protection with comfort. The TPU Laminate makes the mattress protector fully waterproof and the jersey knitted polyester fabric makes the mattress encasement soft and comfortable to create a relaxing night's sleep. SOFT AND BREATHABLE: Made from a high quality jersey knitted polyester, the Guardmax Mattress Cover is soft, breathable, and extremely comfortable. Gone are the days of feeling like you are sleeping on a plastic mattress case and welcome to full protection without compromising on comfort. HYPOALLERGENIC: The Guardmax Mattress Encasement protects against dust, dirt, and dander. When you go to sleep on a Guardmax Mattress Protector you don't have to worry about sneezing throughout the night anymore. Sleep allergy free with Guardmax. Guardmax Mattress Encasement is a waterproof and bed bug barrier mattress encasement. The Guardmax Mattress Protector comes in the following sizes; Queen, Short Queen, King, California King, Full, Full XL, Twin, Twin XL, RV (48" X 75"), and Cot (33" x 75"), Crib, and Mini Crib. The Guardmax Mattress Cover has a durable and air tight zipper made of nylon to ensure it won't snap or trap easily. It is currently offered in the following colors; white, blue, and gray.